package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.EmployeeNameExistException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.admin.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.GetMapping;

import javax.annotation.Resource;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl  implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8));

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }

    @Override
    public Result<String> save(EmployeeDTO dto) {
        //代码健壮性
        Employee dbemployee = employeeMapper.getByUsername(dto.getUsername());
        if (dbemployee!=null){
            throw new EmployeeNameExistException("用户" + dto.getUsername() + "已存在");
        }
        //1.需要employee实体，new 一个
        Employee employee = new Employee();
        //2.将dto的数据复制给实体 ,copyProperties(被复制对象，目标对象)
        BeanUtils.copyProperties(dto,employee);
        //3.初始化没传过来的值
        employee.setPassword("12345");
        employee.setStatus(1);
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now()) ;
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
        //往employee表中插入一条数据
        employeeMapper.save(employee);
        return Result.success();
    }

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO dto) {
        //利用Mybatis的分页插件PageHelper进行分页查询
        PageHelper.startPage(dto.getPage(), dto.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(dto);
        long total = page.getTotal();
        List<Employee> records = page.getResult();

        return new PageResult(total, records);
    }

    @Override
    public void updateStatusById(Integer status, Integer id) {
        employeeMapper.startOrstop(status,id);
    }

    @Override
    public Employee getById(Integer id) {
        return employeeMapper.findById(id);
    }

    @Override
    public void updateEmp(Employee employee) {
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }


}
